Nonlocal Andreev Entanglements and Triplet Correlations in Graphene with Spin Orbit Coupling
arXiv:1710.00840 · doi:10.1103/PhysRevB.96.161403
Abstract
Using a wavefunction Dirac Bogoliubov-de Gennes method, we demonstrate that the tunable Fermi level of a graphene layer in the presence of Rashba spin orbit coupling (RSOC) allows for producing an anomalous nonlocal Andreev reflection and equal spin superconducting triplet pairing. We consider a graphene junction of a ferromagnet-RSOC-superconductor-ferromagnet configuration and study scattering processes, the appearance of spin triplet correlations, and charge conductance in this structure. We show that the anomalous crossed Andreev reflection is linked to the equal spin triplet pairing. Moreover, by calculating current cross-correlations, our results reveal that this phenomenon causes negative charge conductance at weak voltages and can be revealed in a spectroscopy experiment, and may provide a tool for detecting the entanglement of the equal spin superconducting pair correlations in hybrid structures.
References in corpus (23)
- Non-Abelian Anyons and Topological Quantum Computation
- Andreev reflection and Klein tunneling in graphene
- Bipolar supercurrent in graphene
- A spin triplet supercurrent through the half-metallic ferromagnet CrO2
- Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
- Spin-Orbit Proximity Effect in Graphene
- Amplitude / Higgs Modes in Condensed Matter Physics
- Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
- Triplet proximity effect in FSF trilayers
- Crossed Andreev reflection in a graphene bipolar transistor
- Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures
- Current-current correlations in hybrid superconducting and normal metal multiterminal structures
- Nonlocal Andreev reflection at high transmissions
- Tunable Anomalous Andreev Reflection and Triplet Pairings in Spin Orbit Coupled Graphene
- Spontaneous Edge Accumulation of Spin Currents in Finite-Size Two-Dimensional Diffusive Spin-Orbit Coupled SFS Heterostructures
- Local electrical tuning of the nonlocal signals in a Cooper pair splitter
- Long-Range Spin-Triplet Correlations and Edge Spin Currents in Diffusive Spin-Orbit Coupled SNS Hybrids with a Single Spin-Active Interface
- Evidence for spin-triplet superconducting correlations in metal-oxide heterostructures with non-collinear magnetization
- Pure Odd Frequency Superconductivity at the Cores of Proximity Vortices
- Double quantum dot Cooper-pair splitter at finite couplings
- Andreev conductance of a domain wall
- Quantum charge pumping through resonant crossed Andreev reflection in superconducting hybrid junction of Silicene
- Superconducting electron and hole lenses